Bring water to boil, add salt and gradually pour in the rice. Cook, covered over low heat for 15-20 minutes until water is absorbed. Cool slightly. Brown onion in 1 tablespoon butter. Add milk, liver, onion, molasses, spices and raisins to the rice. Mix in egg. Pour into well-greased casserole. Sprinkle with bread crumbs and dot with butter. Bake at 350 degrees for 20 minutes or until firm. Serve with lingonberry or cranberry sauce or jam and melted butter to pour over. 4-6 servings.